Exhaust apparatus.



-Patented July 29,1902. Y. smm. EXHAUST APPARATUS.

(Application filed Mar. 7, 1902.) (No Model.) 2 Sheqts-Sheet l'.

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No. 702x713; Patented m 29, 1902.

.1. v. SMITH.

EXHAUST APPARATUS.

(Application filed. Mar. 7, 1902.) 2 Sheets-Sheet 2.

(No Model.)

INK/ENTER W 7 Z J l 35 view of the same.

UNITED STATES PATENT OFFICE.

JOHN Y. SM ITIL OF DOYLE STOWN', PENNSYLVANIA, ASSIGNOR, BY DIRECT ANDMESNE ASSIGNMENTS, TO WILLIAMR. DEWEY, TRUSTEE, OF NEW- TON,MASSACHUSETTS;

EXHAUST APPARATUS.

SPECIFICATION formingpart of Letters Patent No. 705,713, dated July 29,1902. Application filed March 7, 19Q2. Serial No. 97049. (No model.)

3T0 all whom it may concern.-

Be it known that I, JOHN Y. SMITH, of Doylestown, in the county of Bucksand State of Pennsylvania, have invented certain new '5 and usefulImprovements in Exhaust Apparatus, of which the following is aspecification.

This invention relates principally to exhaust apparatus for consumingsmoke and to sparks from boiler-furnaces, and may be used in connectionwith the furnaces of either comotives or other movable engines or withthefurnaces of stationary engines.

The invention consists in the several 1 5 improvements hereinafterdescribed and claimed, whereby a practically continuous upward oroutward draft may be maintained in a furnace of the character abovespecified, thus preventing back pressure or any considerable cessationof draft and facilitating combustion to such an extent as to practicallyconsume the smoke and sparks, besides accomplishing other desirableresults, all as hereinafter described.

Of the accompanying drawings, forming a part of this specification,Figure 1 represents a side elevation of a portion of a road-engineprovided with an exhaust apparatus embodying my invention. Fig. 2represents a section on line 2 2 of Fig. 1. Fig. 3 represents anenlargement of a portion of Fig. 2, showing the exhaust-nozzle insection. Fig. at represents a detached sectional view of theexhaust-nozzle. Fig. 5 represents a top plan Fig. 6 represents a topplan view of the live-steam nozzle shown in edge view in Fig. 3. Fig. 7represents a section on line 7 7 of Fig. 6. Fig. 8 represents a sectionon line 8 S-of Fig. 4:. Fig. 9 represents a section on line 9 9 of Fig.8. Fig. 10 represents a vertical transverse section through thesmoke-cha1nber of a locomotiveengine provided with an exhaust apparatusembodying my invention. Fig. 11 represents a sectional view of theexhaust-nozzle shown in Fig. 10. Fig. 12 represents a section on line 1212 of Fig. 11 and a plan view of the parts below said line. i

The same reference characters indicate the same parts in all thefigures.

Referring to Figs. 1 to 9, inclusive, a represents the smoke-stack of asingle-cylinder engine, which, as shown in Figs. l and 2, is ofthe typeused for impelling traction or road engines for any purposes, I) beingthe cylinder, cthe steam-chest, and d the exhaustpipe, extending fromthe steam-chest into the smoke -chamber below the stack;

In carrying out my invention I provide an annular exhaust nozzle e,which receives steam from the pipe d, said nozzle being 10- cated in thebase of the stack and arranged in a substantially horizontal plane, itsformation being such that it delivers acircular series of steam-jetsupwardly into the stack and in close proximity to the wall of the stack,so that the steam-jets surrounda central passage 'for smoke and productsof combustion from the furnace. The top or upper end of the nozzle issubstantially. horizontal. and is provided with a series of outlets 6,arranged in a circular series in close proximity to the internal surfaceof the stack. I The bottom'e of the nozzle isinclined from one side toth'e opposite side of the nozzle, as indicated 7 5 by dotted lines inFigs. 3 and 4, so that the height of the nozzle or the distance betweenits bottom and its top varies, the height being greatest at one side andsmallest at the opposite side. At the side of the nozzle having thegreatest height is a steam-inlet e connected with the exhaust-pipe 01,so that the exhaust-steam enters the nozzle at its highest or deepestportion. The reduction in the height or depth of the nozzle from theside having the inlet 6 to the opposite side causes a practically equaldistribution of the steampressure throughout the entire circle of thenozzle, so that the steam issues from all the outlets e at practicallythe same pressure. 0 The equalization of the pressure is facilitated bythe horizontal arrangement of the inlet a which causes the steam toenter in a horizontal or approximately horizontal direction.

f represents a supplemental or petticoat 5 pipe, which is surrounded bythe nozzle e and extends a short distance below and a short distanceabove the same, as shown in Fig. 3. Between the pipe f and the interiorof the nozzle are a series of vertical passages I00 which communicate attheir lower ends with the smoke-chamber and at their upper ends with thestack. The intermittent discharges of exhaust-steam from the nozzle einduce upward currents of air from the smoke-chamber throu h thepassages g these currents continuing after the supply of exhaust-steamis cut OE and practically until the next admission of exhaust-steam, sothat the outlets e of the nozzle and the pipe fconjointly furnish acontinuous upward draft in the stack, preventing back pressure or thedownward movementof relatively cold air through the stack. By thusmaintaining a continuous draft I am enabled to much more completelyconsume the smoke, cinders, sparks, &c. than heretofore. The passages gare preferably formed by inwardly-projecting protuberances a", formed onthe inner wall of the nozzle 6, said protuberances bearing on theexternal surface of the supplemental pipe f, as shown in Figs. 3 and 5.

The steam-jets and induced jets or currents form a practically circularseries, passing upwardly along the inner wall of the stack andsurrounding the central portion of the stack, through which the productsof combustion pass, the said products being thus exposed to contact withan annular enveloping stream of steam and hot air, which facilitates thecombustion of any unconsumed products that may pass above the nozzle.

9 represents a live-steam nozzle which is connected by a pipe g with thesteam-space of the boiler and is arranged to deliver jets of steam underboiler-pressure upwardly into thesupplemental pipef, said nozzle beingof annular form, so that it. does not interfere materially with theupward movement of the products of combustion into said pipe f. The pipeg is to be closed while the engine is in operation and exhaust-steam isbeing supplied through the pipe d. When the engine is not in operation,the pipe g may be opened, the live steam supplied by it creating acontinuous upward draft in the stack and producing the same effect asthe upward draft caused by the exhaust-nozzle e.

My invention, so far as the varying height or depth of the annularexhaust-nozzle is concerned, is not limited to the construction shown inFigs. 1 to 9, inclusive. In Figs. 10 and 11 I show an adaptation of thesaid nozzle to a locomotive-engine. 2' represents the stack of theengine, andj 7c represent two concentric annular exhaust-nozzles, onelocated within the other, the two nozzles being located at the base ofthe stack. The outer nozzle j receives exhaust-steam from one of thecylinders of the engine through an inlet 3', while the inner nozzlereceives exhauststeam from the opposite cylinder through an inlet 76'.The nozzlej has an inclined bottom j while the nozzle is has anoppositely-inclined bottom 70 The outlets m at the upper ends of thenozzles are arranged in a circular series. The steam is admittedalternately into the nozzles j and k and maintains a practicallycontinuous draft through the stack.

I claim- 1. An apparatus of the character specified, comprisinga stackor conduit, and an annular exhaust-nozzle within the conduit, saidnozzle having in its upper side a series of outlets arranged to delivera series of jets surrounding the central portion of the conduit, and anexhaust-pipe entering one side of said nozzle and arranged to deliversteam horizontally thereto, the bottom of the nozzle being inclinedrelatively to the top, whereby the pressure of the steam at the severaloutlets is substantially equalized.

2. An apparatus of the character specified, comprising a stack orconduit, an annular exhaust-nozzle in said conduit having in its upperside a series of outlets arranged to deliver a series of jetssurrounding the central portion of the stack, an exhaust-pipecommunicating with the nozzle, a supplemental conduit surrounded by saidnozzle, and a series of passages between the nozzle and supplementalconduit, whereby a series of induced jets of air from the smoke-chambermay be admitted to the stack.

3. An apparatus of the character specified, comprising a stack orconduit, an annular ex haust-nozzle in said conduit having in its upperside a series of outlets arranged to deliver a series of jetssurrounding the central portion of the stack, and a series of protuberances on its inner side, an exhaust-pipe communicating with the nozzle,and a supplemental conduitsurrounded by the nozzle, said pipe and theprotuberances on the nozzle form ing a series of passages for thedelivery of induced jets of air to the stack.

4. An apparatus of the character specified, comprising a stack orconduit, an annular exhaust-nozzle in said conduit having in its upperside a series of outlets arranged to deliver a series of jetssurrounding the central portion of the stack, an exhaust-pipecommunicating with the nozzle, a supplemental conduit surrounded by saidnozzle, a series of passages between the nozzle and supplementalconduit, whereby a series of induced jets of air from the smoke-chambermay be admitted to the stack, and a nozzle connected with a constantsource of steam-supply and adapted to direct steam under boiler pressure upwardly through the supplemental pipe into the stack.

In testimony whereof I have affixed my sig nature in presence of twowitnesses.

JOHN Y. SMITH.

Witnesses:

HORACE BROWN, A. D. HARRISON.

